How to clean sharks teeth

I do not take credit for this, and have learned this method from a charter captain in the area. However the best way to clean megs/sharks teeth/ and found fishing rods that have years/months of encrusted coral growth is to take Apple Cider Vinegar mixed with water, depending on the level of growth 25% - 75% mixture. Let the item soak for as long as needed with mild scrubbing/scrapping/wiping until desired effect.